タイトル |
-
en
Circulation patterns in the lower Arctic Ocean derived from geochemical data
|
作成者 |
|
アクセス権 |
open access |
権利情報 |
|
主題 |
-
Other
en
Arctic Ocean
-
Other
en
Ocean circulation
-
Other
en
Arctic-Atlantic water exchange
-
Other
en
Geochemical data
-
Other
en
Geochemical conservative tracer
|
内容注記 |
-
Abstract
en
Climatological water-mass structures were identified in the Arctic Ocean using the geochemical dataset in the Hydrochemical Atlas of the Arctic Ocean (HAAC) as well as data on a geochemically conserved parameter, PO4*, based on phosphate and dissolved oxygen. In the upper ocean above a depth of 500m, the HAAC was found to reliably depict the boundary between Pacific-Origin Water (P-Water) and Atlantic-Origin Water (A-Water), which is aligned 135 degrees E-45 degrees W near the surface but rotates counterclockwise with depth. Thus, the Arctic and Atlantic oceans exchange high-silicate P-Water and low-silicate A-Water. The PO4* field in the lower ocean below a depth of 1500m was analyzed statistically, and the results indicated that the Eurasian Basin receives low-PO4* Nordic Seas Deep Water, which flows along the bottom from the Greenland Sea. The routes from the upper ocean to the lower ocean were determined. Only the southern portion of the Canada Basin, which receives water from the Chukchi and Beaufort Seas, has high PO4* levels; the rest of the Amerasian Basin receives low-PO4* water from the Laptev Sea and/or the Barents Sea. The Eurasian Basin receives moderate levels of PO4* from the Fram Strait and from the intermediate layer. The intermediate-layer water gradually travels up from the lower ocean and returns to the Atlantic, entraining the subsurface portion. It is likely that high-PO4* water occasionally flows down from the upper ocean along Greenland, making the Eurasian Basin heterogeneous.
|
出版者 |
en
Springer
|
日付 |
|
言語 |
|
資源タイプ |
journal article |
出版タイプ |
VoR |
資源識別子 |
HDL
http://hdl.handle.net/2115/71647
|
関連 |
-
isIdenticalTo
DOI
https://doi.org/10.1007/s10872-018-0472-2
|
収録誌情報 |
-
-
en
Journal of oceanography
-
巻74
号5
開始ページ453
終了ページ470
|
ファイル |
|
コンテンツ更新日時 |
2023-07-26 |